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Investigations on transfer of water and vanadium ions across Nafion membrane in an operating vanadium redox flow battery
Sun, Chenxi1,2; Chen, Jian1; Zhang, Huamin1; Han, Xi1; Luo, Qingtao1,2
关键词Vanadium Redox Flow Battery Water Transfer Vanadium Ions Transfer Nafion Membrane
刊名JOURNAL OF POWER SOURCES
2010-02-01
DOI10.1016/j.jpowsour.2009.08.041
195期:3页:890-897
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Electrochemistry ; Energy & Fuels
研究领域[WOS]Electrochemistry ; Energy & Fuels
关键词[WOS]CATION-EXCHANGE MEMBRANES ; TRANSPORT
英文摘要Diffusion coefficients of the vanadium ions across Nafion 115 (Dupont) in a vanadium redox flow battery (VRFB) are measured and found to be in the order of V(2+) > VO(2+) >VO(2)(+) > V(3+). It is found that both in self-discharge process and charge-discharge cycles, the concentration difference of vanadium ions between the positive electrolyte (+ve) and negative electrolyte (-ve) is the main reason causing the transfer of vanadium ions across the membrane. In self-discharge process. the transfer of water includes the transfer of vanadium ions with the bound water and the corresponding transfer of protons with the dragged water to balance the charges, and the transfer of water driven by osmosis. In this case, about 75% of the net transfer of water is caused by osmosis. in charge-discharge cycles, except those as mentioned in the case of self-discharge, the transfer of protons with the dragged water across the membrane during the electrode reaction for the formation of internal electric circuit plays the key role in the water transfer. But in the long-term cycles of charge-discharge. the net transfer of water towards +ve is caused by the transfer of vanadium ions with the bound water and the transfer of water driven by osmosis. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000271171900030
引用统计
被引频次:169[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141685
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab PEMFC Key Mat & Technol, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
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GB/T 7714
Sun, Chenxi,Chen, Jian,Zhang, Huamin,et al. Investigations on transfer of water and vanadium ions across Nafion membrane in an operating vanadium redox flow battery[J]. JOURNAL OF POWER SOURCES,2010,195(3):890-897.
APA Sun, Chenxi,Chen, Jian,Zhang, Huamin,Han, Xi,&Luo, Qingtao.(2010).Investigations on transfer of water and vanadium ions across Nafion membrane in an operating vanadium redox flow battery.JOURNAL OF POWER SOURCES,195(3),890-897.
MLA Sun, Chenxi,et al."Investigations on transfer of water and vanadium ions across Nafion membrane in an operating vanadium redox flow battery".JOURNAL OF POWER SOURCES 195.3(2010):890-897.
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